夺14569 A7 B" 五、發明説明（1 ) 〔技術領域〕. 本發明，係關於由驅動模和固定模挾壓板狀的工件進 行彎曲加工之彎曲加工方法及彎曲加工裝置者。 〔背景技術〕 通常，在使用壓軋機等彎曲加工機進行板狀的工件之 V彎曲加工時，已知關於工件的塑性變形之舉動會由材料 的特性値而變化，爲此即使爲相同材料，也會在批間由於 其材料特性値之參差，彎曲角度會大幅度地變化。因此， 很難將驅動模的擠入量精確地控制，在實際之彎曲加工， 大多依靠熟練的操作員之直覺。 因此，爲了因應如此的問題點，已被提案在彎曲工程 中檢出工件的彎曲角度，根據該被檢出之彎曲角度，控制 驅動模的最終擠入量之各種壓軋機，而被實用化。 例如在特開平6 — 3 2 8 1 3 6號公報所提案者，係 在彎曲工程的中途，一旦使上下之模具離開移動而去除負 荷，由在該去除負荷的前後計量工件之彎曲角度，而求得 工件的彈回角度，做爲從該求得之彈回角度，和使模具分 開移動前的工件之彎曲角度，運算最終性的擠入量。 同時，在例如以特開平7 - 2 6 5 9 5 7號公報所提 案者，係在彎曲加工途中模具將工件加壓之狀態將工件的 彎曲角度計測，做爲根據該計測結果運算驅動模之最終擠 入量。此時，係使彈回角度的資料，事先依工件之材質， 每板厚分別記憶，使用該記憶資料校正對工件的彎曲角度 本紙張尺度適用中國國家標準（CNS ) Α4規格（210Χ297公釐） 請 先 閱 讀 背 ί 事 項14569 A7 B " V. Description of the Invention (1) [Technical Field] The present invention relates to a bending processing method and a bending processing device for performing bending processing on a plate-shaped workpiece by a driving die and a fixed die. [Background Art] Generally, when a V-bending of a plate-shaped workpiece is performed using a bending machine such as a rolling mill, it is known that the behavior of plastic deformation of the workpiece changes depending on the characteristics of the material. Therefore, even for the same material, The bending angle will also vary greatly between batches due to the differences in material properties. Therefore, it is difficult to accurately control the squeeze-in amount of the driving die. In actual bending processing, most of them rely on the intuition of a skilled operator. Therefore, in response to such a problem, it has been proposed to detect a bending angle of a workpiece in a bending process, and various rolling mills for controlling the final squeeze-in amount of a driving die according to the detected bending angle have been put into practical use. For example, the applicant proposed in Japanese Unexamined Patent Publication No. 6-3 2 8 1 3 6 is to remove the load once the upper and lower molds are moved away during the bending process, and the bending angle of the workpiece is measured before and after the load is removed. The springback angle of the workpiece is obtained, and the final springback angle is calculated from the obtained springback angle and the bending angle of the workpiece before the mold is moved separately. At the same time, for example, the applicant proposed in Japanese Patent Application Laid-Open No. 7-2 6 5 9 5 7 measures the bending angle of the workpiece while the workpiece is being pressurized during the bending process, and calculates the driving mold based on the measurement result. The final squeeze amount. At this time, the data of the springback angle is memorized in advance according to the material of the workpiece and each plate thickness. The memory data is used to correct the bending angle of the workpiece. The paper size applies the Chinese National Standard (CNS) Α4 specification (210 × 297 mm). Please read me first
ί 經濟部中央標準局員工消費合作社印製 -4- 严 4569 Λ7 五、發明説明（2 ) 之擠入量的關係。 可是，在前述前者之公報（特開平6 — 3 2 8 1 3 6 號公報）所揭示的方法，爲了計測彈回角度，因在彎曲工 程之途中，一旦使上下模相對地離開移動，在工件爲非對 稱形狀時，在去除負荷時有可能工件會倒下而使模具和工 件之接觸點會偏移，故具有需要以某種手段防止工件倒下 之問題點。 一方面，根據前述後者的公報（特開平7 — 2 6 5 9 5 7號公報）所揭示之方法時，因在加壓狀態計 測工件的彎曲角度，故能消除前述之工件倒下的問題。可 是，如第12圖所示，彈回角度0s，實際上因由批間的 材料特性値之參差，稍微具有參差，故爲了實一更高精確 度的彎曲加工，將需要把該彈回角度精確地推定或檢出。 再者，該第1 2圖，係顯示6種類的同種而不同批之冷軋 鋼板的在各種彎曲角度之彈回角度者，顯示由於批間的材 料特性値之參差，彈回角度會參差約±0 . 3。 經濟部中央標準局員工消費合作社印製 同時，在該後者的公報揭示之方法，因係僅校正事先 被記憶的對工件之彎曲角度的擠入量之關係，有時最終擠 入量的推定精確度會比較差。亦即，如第1 3所示，驅動 模之擠入量和彎曲角度的關係，係被彎曲加工之工件原材 料的機械性質之代用特性，由該工件原材料的變更，彎曲 精確度會受很大之影響。因此，要進行接近事先被記憶的 材料之機械性質的材料之彎曲加工時，雖然以該方法也能 夠精確地進行彎曲加工，但是在機械性質相差很多的材料 -5- (讀先閱讀背面之注意事項再填寫本頁) 本纸張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 514569 B? 五、發明説明（3 ) 時，擠入量和彎曲角度之關係將相差很多，有彎曲角度精 確度會變差之虞。 本發明，係爲了消除如此的問題點而開發者，其目的 ，在提供即使在材料之批間有材料特性値的參差，也能夠 高精確度地推定彈回角度及/或最終擠入位置，據此能夠 實現具有極高的角度精確度之彎曲加工的彎曲加工方法及 彎曲加工裝置者。 〔發明之揭示〕 爲了達成前述目的，根據第1發明之彎曲加工方法。 主要係，在由驅動模和固定模將板狀的工件挾壓而進 行彎曲加工之彎曲加工方法。 經濟部中央標隼局員工消費合作社印製 (請先間讀背面之注意事項再填寫本頁) 其特徵爲，在工件的彎曲加工中，在前述驅動模之至 少2處的暫時擠入位置檢出工件之實際彎曲角度，根據關 於此等各暫時擠入位置的擠入量之變化份和實際彎曲角度 的變化份之關係，從事先被記憶的該彎曲加工之每加工條 件的對工件之目標彎曲角度的彈回角度之關係求得前述驅 動模的最終擠入位置，把前述驅動模驅動至該求得之最終 擠入位置爲止者。 在本發明，係在進行工件的彎曲加工時，首先將驅動 模驅動至最初之暫時擠入位置，在此位置檢出工件的實際 彎曲角度，其後更把驅動模驅動至下一暫時擠入位置，在 此位置再度檢出工件的實際彎曲角度。如此地，至少在2 處之暫時擠入位置檢出工件的實際彎曲角度時，將根據對 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） .g. 514569 ΒΊ 五、發明説明（4 ) 應於此等各暫時擠入位置的各擠入量之變化份和各實際彎 曲角度的變化份之關係，求得事先被記億的該彎曲加工之 每加工條件的工件對目標彎曲角度之彈回角度的關係，而 從該關係求得驅動模之最終擠入位置。根據本發明時，考 慮在相同材質的批間之特性値的參差時，做爲對彈回角度 有最大影響之特性値的η値（加工硬化指數）之代用特性 ，使用前述的至少在2處之暫時擠入位置的各擠入量之變 化份和各實際彎曲角度的變化份之關係。由使用如此的關 係，即使在材料之批間有材料特性値的參差，也能夠把彈 回角度精確地推定，因能根據該精確度高的彈回角度之推 定値求得最終擠入位置，故能實現極高精確度之彎曲加工 〇 接著，根據第2發明的彎曲加工方法。 主要係，在由驅動模和固定模將板狀的工件挾壓而進 行彎曲加工之彎曲加工方法。 經濟部中央標準局員工消費合作社印製 (請先閱讀背而之注意事項再填寫本頁) 其特徵爲，在工件的彎曲加工中，至少在前述驅動模 之2處的暫時擠入位置檢出工件之實際彎曲角度，根據關 於此等各暫時擠入位置的擠入量之變化份和實際彎曲角度 的變化份之關係，由將事先被記億的該彎曲加工之每加工 條件的對工件之目標彎曲角度的彈回角度之關係，根據對 事先被記憶的前述擠入量之變化份和實際彎曲角度的變化 份之比的彈回角度之關係校正，而求得前述驅動模的最終 擠入位置，把前述驅動模驅動至該求得的最終擠入位置爲 止者。 本紙張尺度適用中國國家標準（CNS ) Α4規格（210X297公釐） 514569 B" _ 五、發明説明（5 ) 經濟部中央標準局員工消費合作社印製 在本發明，係在工件的彎曲加工時，首先將驅動模驅 動至最初的暫時擠入位置，在此位置檢出工件之實際彎曲 角度，其後更將驅動模驅動至下一暫時擠入位置，而再度 檢出工件的實際彎曲角度。如此地至少在2處之暫時擠入 位置檢出工件的實際彎曲角度後，根據對應於此等各暫時 擠入位置的各擠入量之變化份和各實際彎曲角度的變化份 之關係，求得事先所記憶的該彎曲加工之每加工條件的工 件之對目標彎曲角度的彈回角度之關係，更且，由將其關 係，根據對擠入量的變化份和實際彎曲角度之變化份的比 之彈回角度的關係被校正，而求得驅動模之最終擠入位置 。根據本發明時，考慮在同一材質之在批間的特性値之參 差時，做爲對彈回角度有最大影響的特性値之η値（加工 硬化指數）的代用特性，被使用至少在2處之暫時擠入位 置的各擠入量之變化份和各實際彎曲角度的變化份之關係 ，做爲根據該關係求得彈回角度。同時，同樣地，根據在 該至少2處的暫時擠入位置之各擠入量的變化份和各實際 彎曲角度的變化份之關係，換言之，考慮材料的機械性質 之代用特性値的擠入量和彎曲角度之關係，做爲將能得到 將成目標的彎曲角度之最終擠入位置，由曲線近似或直線 近似求得。因此，例如在材料的批間，即使有材料特性値 之參差，也能夠精確地推定彈回角度及驅動模之最終擠入 位置。 接著，由第3發明的彎曲加工裝置，係關於爲了將由 前述第1發明的彎曲加工裝置具體地實現之裝置者。 -8- 本紙張尺度適用中國國家標準（CMS ) Α4規格（210X297公釐） 514569 Λ7 五、發明説明（6 ) 主要係，在由驅動模和固定模將板狀的工.件挾壓而進 行彎曲加工之彎曲加工裝置。 其特徵爲，具備： (a )記億工件的每加工條件之對其工件的彎曲角度 之前述驅動模的擠入量之關係及對擠入量的變化份和實際 r 彎曲角度之變化份的比之彈回角度的關係之記億手段， (b )檢出工件的彎曲加工中之彎曲角度的角度檢出 手段， (c)把前述驅動模之至少在2處的暫時擠入位置由 前述角度檢出手段所檢出之工件的實際彎曲角度之變化份 及關於此等各擠入位置的擠入量之變化份運算，同時由被 記憶在前述記憶手段的擠入量之變化份和對實際彎曲角度 的變化份比的彈回角度之關係，運算工件的在目標彎曲角 度之彈回角度，由該運算所得的彈回角度運算前述驅動模 之最終擠入位置的運算手段。 (d )及把前述驅動模驅動至前述暫時擠入位置後， 驅動至前述最終擠入位置爲止之模具驅動手段者。 經濟部中央標準局員工消费合作社印製 本發明，係事先在記憶手段，被記憶有對工件的彎曲 角度之前述驅動模的擠入量之關係，及擠入量的變化份和 對實際彎曲角度的變化份之比的彈回角度之關係。在工件 的彎曲加工時，首先由模具驅動手段將驅動模驅動至最初 之暫時擠入位置，在其位置由角度檢出手段檢出工件的實 際彎曲角度，其後更將驅動模驅動至下一暫時擠入位置， 而在其位置再度檢出工件之實際彎曲角度。如此地，至少 -9- (請先閱讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 514569 A7 B7 五、發明説明（7 ) 在2處的暫時擠入位置檢出工件之實際彎曲角度後，將由 被記憶在前述記億手段的擠入量之變化份和對實際彎曲角 度的變化份之比的彈回角度之關係，運算在工件的目標彎 曲角度之彈回角度，考慮該彈回角度被運算前述驅動模的 最終擠入位置。然後，驅動模將被驅動至該被運算之最終 擠入位置，而完成彎曲加工。如此地，因至少根據在2處 的角度檢出位置之實際彎曲角度被推定工件在目標彎曲角 度的彈回角度，即使由在材料之批間的材料特性値之參差 ，在彈回角度有參差時，也能夠把該彈回角度精確地推定 ，據此能夠實現精確度極高之彎曲加工· 在該第3發明，前述運算手段，以做爲將前述工件的 對目標彎曲角度之彈回角度的關係，由前述擠入量之變化 份和對實際彎曲角度的變化份之比的彈回角度之關係校正 ，而運算前述驅動模的最終擠入位置者爲理想。 前述至少2處之暫時擠入位置，能夠從被記憶在前述 記億手段的工件對彎曲角度之驅動模的擠入量之關係，及 工件對彎曲角度的彈回角度之關係被運算。 〔實施例〕 接著，關於由本發明的彎曲加工方法及彎曲加工裝置 之具體性實施例，參照圖面說明。 (第1實施例） 在第1圖，顯示關於本發明的一實施例之彎曲加工裝 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 請 先 閱 ik 背 面 之 注 意 事 項 Ηί Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs -4- Yan 4569 Λ7 V. The relationship between the amount of crowd-in of the invention description (2). However, in the method disclosed in the former publication (Japanese Unexamined Patent Publication No. 6-3 2 8 1 36), in order to measure the springback angle, once the upper and lower molds are relatively moved away during the bending process, In the case of an asymmetrical shape, the workpiece may fall and the contact point between the mold and the workpiece may be shifted when the load is removed. Therefore, there is a problem that the workpiece needs to be prevented from falling by some means. On the other hand, according to the method disclosed in the latter publication (Japanese Patent Application Laid-Open No. 7-2 6 5 9 5 7), since the bending angle of the workpiece is measured in a pressurized state, the aforementioned problem of falling of the workpiece can be eliminated. However, as shown in Figure 12, the rebound angle of 0s is actually slightly different due to the uneven material characteristics between batches. Therefore, in order to achieve a more accurate bending process, the rebound angle will need to be accurate. Ground presumption or detection. Moreover, the 12th figure shows the springback angles of 6 kinds of cold rolled steel plates of the same type and different batches at various bending angles. It shows that the springback angles may vary due to the differences in material characteristics between batches. ± 0.3. At the same time as printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs, the method disclosed in the latter's bulletin only corrects the relationship between the amount of penetration of the bending angle of the workpiece that is memorized in advance, and sometimes the estimation of the final penetration is accurate. Degree will be worse. That is, as shown in No. 13, the relationship between the extrusion amount of the driving die and the bending angle is a substitute characteristic of the mechanical properties of the raw material of the workpiece being bent, and the bending accuracy will be greatly affected by the change of the raw material of the workpiece. Influence. Therefore, when you want to perform bending of materials that are close to the mechanical properties of materials that are memorized in advance, although this method can also perform accurate bending, but for materials with much different mechanical properties -5- (Read the note on the back first Please fill in this page again on this page) This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) 514569 B? 5. In the description of the invention (3), the relationship between the amount of extrusion and the bending angle will be much different, there is bending There is a risk that the angular accuracy will deteriorate. The present invention was developed by the present invention to eliminate such problems, and its purpose is to provide a highly accurate estimation of the springback angle and / or the final extrusion position even if there are variations in material characteristics between batches of materials. According to this, it is possible to realize a bending processing method and a bending processing device having a bending processing having extremely high angular accuracy. [Disclosure of the Invention] In order to achieve the foregoing object, the bending processing method according to the first invention. It is mainly a bending method in which a plate-shaped workpiece is pressed by a driving die and a fixed die to perform bending processing. Printed by the Employees' Cooperatives of the Central Bureau of Standards, Ministry of Economic Affairs (please read the precautions on the back before filling out this page). It is characterized in that during the bending process of the workpiece, at least two positions of the aforementioned driving die are temporarily squeezed in. The actual bending angle of the workpiece, according to the relationship between the change in the amount of squeeze in at each of the temporary squeeze positions and the change in the actual bending angle, the target of the workpiece for each processing condition of the bending process that is memorized in advance The relationship between the springback angle of the bending angle is used to obtain the final squeeze-in position of the driving die, and the drive die is driven to the obtained final squeeze-in position. In the present invention, when the workpiece is bent, the driving die is first driven to the initial temporary extrusion position, and the actual bending angle of the workpiece is detected at this position, and then the driving die is driven to the next temporary extrusion. Position, at which the actual bending angle of the workpiece is detected again. In this way, when the actual bending angle of the workpiece is detected at at least two temporary squeeze-in positions, the Chinese National Standard (CNS) A4 specification (210X297 mm) will be applied according to the paper size. G. 514569 ΒΊ 5. Description of the invention ( 4) The relationship between the amount of change in the amount of indentation and the amount of change in the actual bending angle at each of the temporary squeeze positions should be calculated in advance. The relationship between the springback angle and the final squeeze-in position of the driving die is obtained from this relationship. According to the present invention, when considering the variation of the characteristic 値 between batches of the same material, as the substitute characteristic of η 値 (work hardening index), which has the greatest influence on the springback angle, use the aforementioned at least 2 places. The relationship between the amount of change in the amount of indentation and the amount of change in the actual bending angle at the temporary insertion position. By using such a relationship, even if there are variations in the material characteristics between the batches of materials, the springback angle can be accurately estimated, because the final squeeze-in position can be obtained based on the estimation of the springback angle with high accuracy. Therefore, a highly accurate bending process can be realized. Next, the bending process method according to the second invention. It is mainly a bending method in which a plate-shaped workpiece is pressed by a driving die and a fixed die to perform bending processing. Printed by the Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs (please read the precautions before filling this page) It is characterized in that during the bending process of the workpiece, it is detected at least in the temporary squeeze-in position of the aforementioned driving die The actual bending angle of the workpiece is based on the relationship between the change in the amount of indentation at each of the temporary squeeze positions and the change in the actual bending angle. The relationship of the rebound angle of the target bending angle is corrected based on the relationship of the rebound angle of the ratio of the change in the amount of squeeze in previously memorized and the ratio of the change in the actual bending angle to determine the final squeeze of the driving die. Position, the aforementioned driving die is driven to the determined final squeeze-in position. This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) 514569 B " _ 5. Description of the invention (5) The Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs printed this invention, which is used in the bending process of workpieces. First drive the driving die to the initial temporary extrusion position, detect the actual bending angle of the workpiece at this position, and then drive the driving die to the next temporary extrusion position, and then detect the actual bending angle of the workpiece again. After detecting the actual bending angle of the workpiece at at least two temporary squeeze positions in this way, based on the relationship between the change in the amount of the push-in and the change in the actual bending angle corresponding to these temporary push-in positions, The relationship between the springback angle of the workpiece to the target bending angle for each bending condition of the bending process can be memorized in advance, and the relationship is based on the change in the amount of extrusion and the change in the actual bending angle. In contrast, the relationship of the rebound angle is corrected, and the final squeeze-in position of the driving die is obtained. According to the present invention, in the case where the characteristics between batches of the same material are varied, as an alternative characteristic of the characteristic η (work hardening index) that has the greatest influence on the springback angle, it is used at least 2 places. The relationship between the amount of change in the amount of indentation and the amount of change in the actual bending angle at the temporary insertion position is used to determine the springback angle based on the relationship. At the same time, similarly, according to the relationship between the variation of the extrusion amount and the variation of the actual bending angle at the at least two temporary extrusion positions, in other words, considering the mechanical properties of the material, the substitution characteristic 値The relationship with the bending angle is used to obtain the final squeezing position of the target bending angle, which can be obtained by curve approximation or linear approximation. Therefore, for example, it is possible to accurately estimate the springback angle and the final squeeze-in position of the driving die even if there are variations in the material characteristics between batches of materials. Next, the bending processing apparatus according to the third invention relates to a device for realizing the bending processing apparatus according to the first invention. -8- This paper size applies the Chinese National Standard (CMS) A4 specification (210X297 mm) 514569 Λ7 V. Description of the invention (6) Mainly, the plate-shaped work is pressed by the driving mold and fixed mold. Bending processing device. It is characterized by having: (a) the relationship between the amount of extrusion of the aforementioned driving die and the amount of variation of the amount of extrusion and the amount of variation of the actual r-bending angle for each of the processing conditions of the bending angle of the workpiece with respect to each of the machining conditions; Compared with the method of counting the relationship of the springback angle, (b) the angle detection means for detecting the bending angle in the bending process of the workpiece, (c) the temporary squeeze-in position of at least two places of the driving die from the foregoing The calculation of the change in the actual bending angle of the workpiece detected by the angle detection means and the change in the amount of squeeze in at each of the squeeze positions, and the change in the amount of squeeze in the memory means The relationship between the springback angle of the change ratio of the actual bending angle is used to calculate the springback angle of the workpiece at the target bending angle, and the springback angle obtained by the calculation is used to calculate the final squeeze position of the driving die. (d) and a mold driving means that drives the driving die to the temporary squeeze position and drives to the final squeeze position. The invention is printed by the Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs. It is stored in memory in advance, and the relationship between the pushing amount of the aforementioned driving mold and the bending angle of the workpiece is memorized. The relationship between the springback angle of the ratio of change. In the bending process of the workpiece, the driving die is first driven by the die driving means to the initial temporary squeeze position, and the actual bending angle of the workpiece is detected by the angle detection means at the position, and the driving die is then driven to the next Squeeze into the position temporarily, and detect the actual bending angle of the workpiece again at its position. In this way, at least -9- (Please read the precautions on the back before filling this page) This paper size applies Chinese National Standard (CNS) A4 specification (210X297 mm) 514569 A7 B7 V. Description of invention (7) at 2 places After detecting the actual bending angle of the workpiece at the temporary squeeze-in position, the relationship between the change in the amount of squeeze in memorized in the aforementioned counting method and the rebound angle to the ratio of the change in the actual bending angle is calculated to calculate the The springback angle of the target bending angle is calculated by calculating the final squeeze-in position of the aforementioned driving die. Then, the driving die will be driven to the final pushed-in position of the operation to complete the bending process. In this way, the springback angle of the workpiece at the target bending angle is estimated based on the actual bending angle of at least two angle detection positions, even if there are variations in the material characteristics between the batches of materials, there are variations in the springback angle. In such a case, the springback angle can be accurately estimated, so that extremely accurate bending can be realized. In the third invention, the calculation means is used as the springback angle of the workpiece to the target bending angle. The relationship between the displacement and the springback angle of the ratio of the change in the actual bending angle and the ratio of the change in the actual bending angle is corrected, and it is ideal to calculate the final squeeze position of the driving die. The at least two temporary push-in positions can be calculated from the relationship between the pushing-in amount of the driving die of the workpiece to the bending angle and the spring-back angle of the workpiece to the bending angle, which are memorized in the aforesaid hundred million means. [Examples] Next, specific examples of the bending processing method and the bending processing device according to the present invention will be described with reference to the drawings. (First Embodiment) In Fig. 1, a bending processing device according to an embodiment of the present invention is shown. The paper size is in accordance with the Chinese National Standard (CNS) A4 specification (210X297 mm). Please read the notes on the back of ik first. Η
iT 經濟部中央樣準局員工消費合作社印製 -10- 514569 A7 B*7 五、發明説明（8 ) 置的系統構成圖。 在本實施例的彎曲加工裝置（壓軋機），係在固定台 1上被固定模座2，同時在該模座2上被安裝下模3，和 該下模3對向對該下模3接近分開地被升降驅動的撞鎚4 之下部安裝有上模5。將被彎曲加工的板狀之工件W，將 被插入在下模3和上模5之間，由使該工件W的端部碰在 制止逆行裝置6之狀態，使撞鎚4降低將其工件W以下模 3和上模5挾壓，成爲將工件W進行彎曲加工。 在前述固定台1的前部，設有在工件W之彎曲工程中 檢出其工件W的彎曲角度之角度檢出單元7。該角度檢出 單元7，係包含對工件W的折曲外面投射縫隙光之光源8 ，和把由該光源8被形成在工件W外面的線狀投光像攝影 之C CD攝影機9，由將該C CD攝影機9所取入之圖像 予以圖像處理，而檢出工件W的彎曲角度者。同時，該角 度檢出單元7，不僅在固定台1之前方，也能夠設在後方 ，能夠如此地設在固定台1的兩側，由檢出工件之2個折 曲外面的彎曲角度，能夠設法高角度檢出精確度。 經濟部中央標準局員工消费合作社印製 前述由C C D攝影機9所取入的圖像，將被照出在遙 控電視機，同時，將做爲圖像資料，在彎曲角度運算部 1 0被處理。然後，由該彎曲角度運算部1 0的運算，被 算出工件W之彎曲角度，將其運算結果輸入NC裝置1 1 。該N C裝置1.丨，備有記憶工件W的每彎曲條件（加工條 件）之擠入量的變化份和對實際彎曲角度之變化份的比之 多數的彈回角度之關係，及對工件的彎曲角度之多數的模 -11 - 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 514569 五、發明説明（9 ) 具擠入量之關係等的記憶手段1 2，同時備有根據被記憶 在該記憶手段1 2之資料，和工件W的彎曲條件（材質， 板厚，彎曲形狀，模具形狀，機械資訊等），運算上模5 之暫時擠入位置及最終擠入位置（下死點）的運算手段 13° 經濟部中央標準局員工消费合作社印裝 (請先閱讀背面之注意事項再填寫木頁) 可是，在板狀的工件W進行彎曲加工時所產生之彈回 (由彈性的回復）的角度，雖然被認爲和材料之抗拉強度 ，直彈性係數，加工碳化指數（η値）等有關，可是，僅 考慮在同一材質的批間之特性値的參差時，可以認爲對該 彈回角度影響最大的特性値爲η値。同時，在第2圖，顯 示有在冷軋鋼板調査η値和彈回角度的關係之結果。一方 面，如第3圖所示，已知η値和材料的彎曲半徑有大之關 係，同時如第4圖所示，已知工件W的彎曲半徑不同時， 在同一下死點（上模之擠入位置）的工件W之彎曲角度會 產生變化。亦即，在某下死點，工件的彎曲角度小之材料 、彎曲半徑大、η値大，結果彈回角度會變大的關係將會 成立。從此點，由在所定位置檢出工件W之彎曲角度，而 推定彈回角度之事成爲可能，根據此結果由控制驅動模的 上模5之擠入量，將能夠實現不受材料的參差之高精確彎 曲。 在本實施例，係做爲對彈回角度有最大影響的特性値 之前述η値的代用特性，算出至少在2處的暫時擠入位置 之各擠入量的變化份d D和各實際彎曲角度之變化份d 0 的比dD/d0，根據該比dD/d0和彈回角度0 s之 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 514569 A 7 B*7 五、發明説明（10 ) 關係，算出在目標彎曲角度的彈回角度。 接著，把在本實施例的模具擠入量之控制流程，按照 第5圖所示的流程依次說明。 S 1 :讀入事先被輸入而被記憶在記億手段1 2的工 件W之彎曲條件（材質，板厚，彎曲形狀，模具形狀，機 r 械資訊等）。 S 2 :從工件W對彎曲角度0的模具擠入量D之關係 (參照第c圖），及工件W對目標彎曲角度的彈回角度之 關係選擇缺設（N C裝置具有的初始値）之關係式，運算 使上下兩模具接近移動時的暫時擠入位置，換言之運算η 處（η 2 2 )的角度檢出位置。再者，此等暫時擠入位置 ，係在不將工件W太彎曲的範圍，至少1處係儘量接近目 標彎曲角度之位置爲理想。 S 3〜S 5 :由操作員把工件W設定而開始彎曲加工 ，使上模5對下模3接近移動至η處的暫時擠入位置中最 初之暫時擠入位置爲止。然後，到達該暫時擠入位置時， 由角度檢出單元7、檢出工件W之彎曲角度。 經濟部中央標挲局員工消f合作社印製 S6:角度檢出次數Ν未達到η時（Ν<η)，再度 使上模5移動至第2暫時擠入位置，在該第2暫時擠入位 置，再度檢出工件W之彎曲角度。再者，該處理將重複至 成爲Ν = η爲止。 S 7 :從上述η處的角度檢出結果，算出擠入量之變 化份dD和實際彎曲角度的變化份d0之比dD/d0。 例如η = 2時，算出在2點的角度檢出位置之擠入量的差 • 13 - (讀先閲讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 514569 B*7 五、發明説明（11 ) 請 閱 讀 背 意 事 項 dD和檢出角度之差d0的比dD/d0。然後，使用事 先被記憶之對於比dD/d 0的彈回角度0 s之關係，換 言之使用dD/d0 — 0 s曲線（參照第7圖），求得相 當於如上述地被自出的dD/d0之彈回角度0 s。如此 地，推定在目標彎曲角度之彈回角度0 s。在此，要算出 前述比d D/d 0時，如果角度檢出位置（暫時擠入位置 )爲2處（n = 2 )時，能夠在顯示對彎曲角度0的模具 擠入量D之關係的圖表上，根據2個檢出値求得通過此等 2點之直線，而求得比、d D / d 0。再者，角度檢出位置 (暫時擠入位置）爲3處以上（n^3)時，能夠根據3 個以上的檢出値，使用最小自乘法等手法求得比d D/ d0。再者，第7圖，係將對比dD/d0之彈回角度 0 s的關係，和實驗値資料一起顯示者。 S 8〜S 9 :根據所推定的彈回角度0 s運算上模5 之最終擠入位置，再度把上模5驅動至該位置爲止。 S 1 0 :完成加工而結束流程。 經濟部中央標準局員工消t合作社印製 在該流程所示的處理，雖然在每次之彎曲工程進行也 可以，但是也可以在材料批被變更時等的任意之工程，由 操作員指示校正操作。 根據本實施例時，因根據工件的彎曲工程中之至少在 2處的角度檢出位置之實際彎曲角度，將被推定工件在目 標彎曲角度的彈回角度，由於在料批間之材料特性値的參 差而在彈回角度有參差時，也能夠把彈回角度精確地推定 ，結果，能夠設法提高彎曲加工精確度。 14- 本紙張尺度適用中國國家標準（CNS ) A4%格（210X297公釐） 514569Printed by the Consumer Cooperatives of the Central Procurement Bureau of the Ministry of Economic Affairs -10- 514569 A7 B * 7 V. Description of the system structure of the invention description (8). In the bending processing device (rolling mill) of this embodiment, a die holder 2 is fixed on a fixed table 1 while a lower die 3 is mounted on the die holder 2 and the lower die 3 is opposed to the lower die 3 An upper die 5 is attached to a lower portion of the ram 4 which is driven to be lifted up and down. A plate-like workpiece W to be bent will be inserted between the lower mold 3 and the upper mold 5, and the end of the workpiece W will be brought into contact with the anti-reverse device 6, and the hammer 4 will be lowered to lower the workpiece W. The lower mold 3 and the upper mold 5 are pressed, and the workpiece W is subjected to bending processing. An angle detecting unit 7 is provided at the front portion of the fixed base 1 to detect the bending angle of the workpiece W during the bending process of the workpiece W. The angle detection unit 7 includes a light source 8 for projecting slit light on the bent outer surface of the workpiece W, and a CD camera 9 for photographing a linear projection image formed by the light source 8 outside the workpiece W. The image taken by the C CD camera 9 is subjected to image processing, and the bending angle of the workpiece W is detected. At the same time, the angle detection unit 7 can be provided not only in front of the fixed table 1 but also at the rear. It can be provided on both sides of the fixed table 1 in this way. By detecting the bending angle of the two outside bends of the workpiece, Try to detect accuracy at high angles. Printed by the Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs The aforementioned images taken by the CC camera 9 will be photographed on a remote-control television, and at the same time, they will be processed as image data in the bending angle calculation section 10. Then, the bending angle of the workpiece W is calculated by the calculation by the bending angle computing unit 10, and the result of the calculation is input to the NC device 1 1. This NC device 1. 丨 has a relationship between the springback angle of the majority of the change in the amount of extrusion per bending condition (processing condition) of the workpiece W and the ratio of the change to the actual bending angle, and the The majority of the bending angle -11-This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) 514569 V. Description of the invention (9) Memory means with relation to the amount of squeeze-in etc. 12 According to the data stored in the memory means 12 and the bending conditions (material, plate thickness, bending shape, mold shape, mechanical information, etc.) of the workpiece W, calculate the temporary extrusion position and final extrusion position of the upper mold 5 ( Bottom dead point) calculation method 13 ° Printed by the Consumer Cooperatives of the Central Bureau of Standards of the Ministry of Economic Affairs (please read the precautions on the back before filling in the wood pages). From the perspective of elastic recovery), although it is considered to be related to the tensile strength of the material, the coefficient of linear elasticity, the processing carbonization index (η 値), etc., it only considers the characteristics of the batch between the same material. When the difference is poor, it can be considered that the characteristic 値 which has the greatest influence on the springback angle is η 値. At the same time, Fig. 2 shows the results of investigating the relationship between η 弹 and the springback angle in a cold-rolled steel sheet. On the one hand, as shown in Fig. 3, it is known that η 値 has a large relationship with the bending radius of the material. At the same time, as shown in Fig. 4, it is known that when the bending radius of the workpiece W is different, the same dead center (upper die) Bending position of the workpiece W). That is, at a certain bottom dead point, a material with a small bending angle of the workpiece, a large bending radius, and a large η 値, will have a relationship that the springback angle will become larger as a result. From this point, it is possible to detect the bending angle of the workpiece W at a predetermined position and estimate the springback angle. Based on this result, by controlling the amount of penetration of the upper die 5 of the driving die, it will be possible to achieve the same regardless of material variations. High precision bending. In this embodiment, as the characteristic which has the greatest influence on the rebound angle, the aforementioned η 値 is used as a substitute characteristic, and the change parts d D and the actual bendings of the squeeze amounts at the temporary squeeze positions of at least 2 are calculated. The ratio dD / d0 of the angle change d 0, according to the ratio dD / d0 and the springback angle of 0 s, the paper standard is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) 514569 A 7 B * 7 V. DESCRIPTION OF THE INVENTION (10) The relationship is to calculate the springback angle at the target bending angle. Next, the control flow of the amount of squeezed in the die in this embodiment will be described in order according to the flow shown in FIG. S 1: Read in the bending conditions (material, plate thickness, bending shape, mold shape, mechanical information, etc.) of the workpiece W, which was input in advance and memorized in the counting means 12. S 2: Select the missing (the initial 具有 of the NC device) from the relationship between the workpiece D's indentation amount D of the bending angle 0 (refer to Figure c) and the relationship between the workpiece W's springback angle to the target bending angle. The relational expression calculates the temporary squeeze position when the upper and lower molds are moved close to each other, in other words, the angle detection position at η (η 2 2) is calculated. In addition, these temporarily squeezed in positions are preferably in a range where the workpiece W is not bent too much, and at least one position is preferably as close to the target bending angle as possible. S 3 to S 5: The operator sets the workpiece W and starts the bending process, so that the upper die 5 moves closer to the lower die 3 to the initial temporary squeeze position among the temporary squeeze positions at η. Then, when the temporary squeeze position is reached, the bending angle of the workpiece W is detected by the angle detection unit 7. Printed by the staff of the Central Bureau of Standards of the Ministry of Economic Affairs and Cooperative Society S6: When the number of angle detections N does not reach η (N < η), the upper mold 5 is moved to the second temporary squeeze position again, and the second temporary squeeze Position, the bending angle of the workpiece W is detected again. Furthermore, this process is repeated until it becomes N = η. S 7: The detection result from the angle at η is used to calculate the ratio dD / d0 of the change amount dD of the squeeze amount and the change amount d0 of the actual bending angle. For example, when η = 2, calculate the difference in the amount of squeeze-in at the angle detection position at 2 o'clock • 13-(Read the precautions on the back before filling this page) This paper size applies the Chinese National Standard (CNS) A4 specification ( 210X297 mm) 514569 B * 7 V. Description of the invention (11) Please read the ratio dD / d0 of the difference dD between the memorandum and the detection angle. Then, using the relationship of the rebound angle 0 s of the ratio dD / d 0 previously memorized, in other words, using the dD / d0 — 0 s curve (refer to FIG. 7), the dD equivalent to the self-extracted as described above is obtained. The rebound angle of / d0 is 0 s. In this way, the springback angle at the target bending angle is estimated to be 0 s. Here, when the ratio d D / d 0 is calculated, if the angle detection position (temporary squeeze position) is 2 (n = 2), the relationship of the die squeeze amount D with respect to the bending angle 0 can be displayed. On the graph of Fig. 2, a straight line passing these two points is obtained from the two detection points, and the ratio, d D / d 0 is obtained. In addition, when the angle detection position (temporary squeeze-in position) is 3 or more (n ^ 3), the ratio d D / d0 can be obtained by using methods such as the minimum self-multiplication method based on 3 or more detection points. Furthermore, Fig. 7 shows the relationship between the springback angle 0 s of dD / d0 and the experimental data. S 8 ~ S 9: Calculate the final squeeze-in position of the upper die 5 according to the estimated springback angle 0 s, and drive the upper die 5 to this position again. S 1 0: Finish the process and end the process. The process shown in this procedure is printed by the staff of the Central Standards Bureau of the Ministry of Economic Affairs. Although the bending process can be performed every time, any process such as when the batch of materials is changed can be corrected by the operator's instructions. operating. According to this embodiment, because the actual bending angle of the position is detected based on at least two angles in the bending process of the workpiece, the springback angle of the workpiece at the target bending angle is estimated. Due to the material characteristics between batches 値When the springback angle is different, the springback angle can be accurately estimated. As a result, it is possible to improve the accuracy of the bending process. 14- This paper size applies to Chinese National Standard (CNS) A4% grid (210X297 mm) 514569
經濟部中央標隼局員工消費合作社印製 五、發明説明（12 ) (第2實施例） 本實施例，係根據驅動模的至少在2處之暫時擠入位 置的各擠入量之變化份和各實際彎曲角度的變化份之關係 ，推定驅動模的最終擠入位置者。在本實施例之系統構成 ，係和第1圖示的第1實施例者相同。因此，關於和第1 實施例共通之部份將省略其說明，以下僅關於本實施例所 特有之部份說明。 在本實施例，驅動模的上模5之驅動控制，換言之模 具擠入量的制，將按照如第8圖所示之流程表如下地進行 〇 T 1 :讀入事先被輸入而被記億在記憶手段1 2的工 件W之彎曲條件（材質，板厚，彎曲形狀，模具形狀，機 械資訊等）。 T2:從工件W對彎曲角度0的模具擠入量D之關係 ，及工件W對目標彎曲角度的彈回角度之關係選擇缺設（ NC裝置具有的初始値）之係式，運算使上下兩.模具接近 移動時的暫時擠入位置，換言之，運算η處（ η 2 2 )的 角度檢出位置。再者，此等暫時擠入位置，係以不過於將 工件W彎曲之範圍，至少1處爲儘可能接近目標彎曲角度 的位置爲理想。 Τ 3〜Τ 5 :由操作員將工件W設定而開始彎曲加工 ，在η處的暫時擠入位置中，使上模5對下模3接近移動 至最初之暫時擠入位置爲止。然後，到達該暫時擠入位置 時，由角度檢出單元7檢出工件W之彎曲角度。 (請先閱讀背面之注意事項再填寫本頁) -裝----- I,訂 本紙張尺度適用中國國家標準（CNS ) Α4規格（210X297公犮） -15- 514569 A? 五、發明説明（13 ) T6 :角度檢出次數N未達η (N<n)時，再度使 上模5移動至第2暫時擠入位置爲止，在該第2暫時擠入 位置再度檢出工件W之彎曲角度。再者，該處理將重複進 行至成爲N = η。 Τ 7 :從上述η處的角度檢出結果，算出擠入量之變 产 化份di—da和實際彎曲角度的變化份(參照第 9圖）。然後，用對事先被記億的彎曲角度之彈回角度 0 s的關係，求得能得到目標彎曲角度0 Τ之最終擠入位置 (下死點）dT。在此，算出該最終擠入位置dT時，角度 檢出位置（暫時擠入位置）爲2處（n = 2 )時，能在顯 示對彎曲角度0的模具擠入量D之關係的圖表（參照第9 圖）上，由根據2個檢出値求得通過2點之直線，而求得 前述最終擠入位置dT。同時，角度檢出位置（暫時擠入位 置）爲3處以上（n^3)時，能夠根據3個以上的檢出 値，使用最小自乘法等手法求得最終擠入位置d τ。 Τ 8 :根據所推定的最終擠入位置dT，再度把上模5 驅動至其位置。 經濟部中央標準局員工消费合作社印製 T9 :結束加工而結束流程。 以該流程顯示的處理，雖然也可认在每次彎曲工進行 ，但是也可以在變更材料批時等任意之工程，由操作員指 示校正操作。 在第1 0圖，顯示有本實施例的彎曲加《工裝置和已往 之彎曲加工裝置（在特開平7 — 2 6 5 9 5 7號公報揭示 者）的彎曲加工精確度之比較結果。從該圖顯示，本實施 -16- (請先閱讀背面之注意事項再填寫本頁) 本纸張尺度適用中國國家標準（CNS ) A4说格（210X297公釐） 514569 五、發明説明（14 ) 例者能夠高精確度地進行彎曲加工。此係，由於考慮材料 的機械性質之代用特性値的擠入量和彎曲角度的關係，而 決定最終擠入位置之故。 根據本實施例時，因將根據至少在2處的角度檢出位 置所檢出之實際彎曲角度被推定驅動模的最終擠入位置， 即使在材料之批間有材料特性値的參差，也能夠把最終擠 入位置精確地推定，將根據該最終擠入位置被進行彎曲加 工，故能實現極高精確度之彎曲加工。 (第3實施例） 經濟部中央標隼局員工消費合作社印製 在本實施例，係做爲對彈回角度影響最大的特性値之 前述η値的代用特性，算出在至少2處之暫時擠入位置的 各擠入量之變化份d D和各實際彎曲角度的變化份d 0之 比dD/d0，由該比dD/d0和彈回角度0s的關係 ，算出在目標彎曲角度之彈回角度。同時，做爲根據如前 述地求得的在目標彎曲角度之彈回角度，和在至少2處的 暫時擠入位置之各擠入量的變化份d D和各實際彎曲角度 之變化份d 0的關係，算出能得到目標彎曲角度之最終擠 入位置（下死點）。 接著，將在本實施例的模具擠入量之控制流程，按照 第1 1圖所示的流程表依次說明。 u 1 :讀入事先被輸入而被記憶在記憶手段1 2的工 件W之彎曲條件（材質，板厚，彎曲形狀，模具形狀，機 械資訊等）。 •17- (請先閱讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 514569 Λ7 B7 五、發明説明（15 ) u2:從工件W從彎曲角度0的模具擠入量D之關係 (參照第6圖），及工件W對目標彎曲角度的彈回角度之 關係，選擇缺設（defort ) (NC裝置具有的初始値）之 % 關係式，運算使上下兩模具接近移動時的暫時擠入位置， 換言之，運算η處（η 2 2 )的角度檢出位置。再者，此 等暫時擠入位置，係在不將工件W過於彎曲之範圍，至少 1處係儘量接近目標彎曲角度之位置爲理想。 u 3〜u 5 :由操作員將工件W設定而開始彎曲加工 ，使上模5對下模3接近移動至η處的暫時擠入位置中最 初之暫時擠入位置。然後，到達該暫時擠入位置時，以角 度檢出單元7檢出工件W之彎曲角度。 u6 :角度檢出次數Ν未達η (Ν<η)時，再度使 上模5移動至第2暫時擠入位置，在第2暫時擠入位置， 再度檢出工件W之彎曲角度。再者，該處理將重複進行至 成爲Ν = η。 經濟部中央標隼局員工消f合作社印裝 u 7 :從上述的η處之角度檢出結果，算出擠入量的 變化份和實際彎曲角度的變化份之比。例如η. = 2時，將 算出在2點的角度檢出位置之擠入量的差d D和檢出角度 之差d0的比dD/d0。然後，使用事先被記憶之對比 例dD/d 0的彈回角度0 s之關係，換言之，使用dD /〇10〜08曲線（參照第7圖），求得相當於如上述地 被算出的比例dD/d 0之彈回角度0 s。如此地，推定 在目標彎曲角度的彈回角度0 s。在此，算出前述比例 dD/d 0時，如果角度檢出位置（暫時擠入位置）爲2 -18- 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 514569 B7 五、發明説明（16 ) 處（η = 2 )時，能夠在顯示對彎曲角度0的模具擠入量 D之關係的圖表上，根據2個檢出値由求得通過此等2點 之直線，而求得比dD/d Θ。再者，角度檢出位置（暫 時擠入位置）爲3處以上（3 )時’能夠根據3個檢 出値，使用最小自乘法等手法等求得比d D/d 0。再者 ，第7圖係將對比dD/d 0的彈回角度0 s之關係，和 實驗値資料一起顯示者。 經濟部中央樣隼局員工消費合作社印製 u 8 :使用由上述η處的角度檢出結果所得之擠入量 的變化份dD (zdi—ds)和與實際彎曲角度的變化份 d0 (βχ- 02)之關係，及如上述地求得的對目標彎曲 角度0τ彈回角度0 s，求得能得到目標彎曲角度0τ之最 終擠入位置d τ (參照第9圖）。在此，算出該最終擠入位 置dT時，如果角度檢出位置（暫時擠入位置）爲2處（η =2 )時，能夠在顯示對彎曲角度0的模具擠入量D之關 係的圖表（參照第9圖）上，根據2個檢出値求得通過此 等2點之直線，而求得前述最終擠入位置dT。再者，角度 檢出位置（暫時擠入位置）爲3處以上（η ^ 3 )時，能 夠由3個以上的檢出，値用最小自乘法等手法，求得最終 擠入位置d τ。 u 9 :根據被推定的最終擠入位置d T，再度把上模5 驅動至其位置。 u 1 〇 :把加工完成而結束流程。 在該流程所顯示的處理，雖然可以在每次之每彎曲工 程進行，但是，也可以在材料批被變更時等的任意工程， -19- (讀先閱讀背而之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 514569Printed by the Employees' Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs 5. Description of the Invention (12) (Second Embodiment) This embodiment is based on the change in the amount of squeeze in at least two temporary squeeze positions of the driving die. The relationship between the actual bending angle and the final squeeze position of the driving die is estimated. The system configuration of this embodiment is the same as that of the first embodiment shown in the first figure. Therefore, the description of the parts in common with the first embodiment will be omitted, and only the parts specific to this embodiment will be described below. In this embodiment, the drive control of the upper mold 5 of the driving mold, in other words, the production of the mold extrusion amount, will be performed according to the flow chart shown in FIG. 8 as follows: T1: The input is input in advance and is recorded in billions. The bending conditions (material, plate thickness, bending shape, mold shape, mechanical information, etc.) of the workpiece W in the memory means 12. T2: From the relationship between the workpiece D's indentation amount D to the bending angle 0 and the relationship between the workpiece W's springback angle to the target bending angle, the missing (initial 値 of the NC device) system is selected to calculate the upper and lower two When the die approaches the temporary squeeze position when it is moving, in other words, the angle detection position at η (η 2 2) is calculated. It should be noted that these temporarily pushed-in positions are preferably within a range that does not bend the workpiece W at least at a position as close to the target bending angle as possible. Τ3 ～ Τ5: The operator sets the workpiece W to start the bending process, and moves the upper mold 5 to the lower mold 3 in the temporary squeeze position at n to the initial temporary squeeze position. Then, when the temporary squeeze position is reached, the bending angle of the work W is detected by the angle detection unit 7. (Please read the precautions on the back before filling out this page) -Packing ----- I. The size of the paper used for the book is applicable to the Chinese National Standard (CNS) A4 specification (210X297 cm) -15- 514569 A? 5. Description of the invention (13) T6: When the number of angle detections N does not reach η (N < n), the upper mold 5 is moved to the second temporary pushing position again, and the bending of the workpiece W is detected again at the second temporary pushing position. angle. Furthermore, this process is repeated until it becomes N = η. Τ7: Detect the result from the angle η above, and calculate the change in the amount of squeezed in di-da and the change in the actual bending angle (see Figure 9). Then, using the relationship of the springback angle 0 s of the bending angle that is recorded in billions in advance, the final squeeze-in position (bottom dead point) dT at which the target bending angle 0 T can be obtained is obtained. Here, when the final squeeze-in position dT is calculated, when the angle detection position (temporary squeeze-in position) is two (n = 2), a graph showing the relationship between the die-injection amount D for the bending angle 0 ( (Refer to FIG. 9). From the two detection points, a straight line passing two points is obtained, and the final squeeze position dT is obtained. At the same time, when the angle detection position (temporary squeeze-in position) is 3 or more (n ^ 3), the final squeeze-in position d τ can be obtained based on three or more detections 値 using methods such as the minimum self-multiplication method. Τ 8: Drive the upper mold 5 to its position again according to the estimated final squeeze-in position dT. Printed by the Consumer Cooperatives of the Central Bureau of Standards of the Ministry of Economic Affairs T9: End processing and end the process. Although the processing shown in this flow can be considered to be performed at each bender, it is also possible to perform an arbitrary instruction such as when changing the batch of materials, and the operator instructs the calibration operation. Fig. 10 shows a comparison result of the bending accuracy of the bending processing device of this embodiment and the conventional bending processing device (disclosed in Japanese Patent Application Laid-Open No. 7-2 6 5 9 5 7). As shown in the figure, this implementation -16- (Please read the notes on the back before filling this page) This paper size applies the Chinese National Standard (CNS) A4 format (210X297 mm) 514569 5. Description of the invention (14) An example can perform bending processing with high accuracy. In this system, the final extrusion position is determined by considering the relationship between the amount of extrusion and the bending angle, which is a substitute for the mechanical properties of the material. According to the present embodiment, the final squeeze-in position of the driving die is estimated based on the actual bending angle detected based on at least two angle detection positions. Even if there are variations in material characteristics between batches of materials, it is possible to The final extrusion position is accurately estimated, and bending processing is performed according to the final extrusion position, so that extremely high-precision bending processing can be realized. (Third embodiment) Printed in this embodiment by the Consumers' Cooperative of the Central Bureau of Standards, Ministry of Economic Affairs, as the substitute characteristic of the aforementioned η, which is the characteristic that has the greatest influence on the rebound angle. The ratio dD / d0 of the change part d D of each squeeze amount and the change part d 0 of each actual bending angle is calculated from the relationship between the ratio dD / d0 and the rebound angle 0s, and the rebound at the target bending angle is calculated. angle. At the same time, the change parts d D and the change parts d 0 of the actual bending angles according to the springback angle at the target bending angle and the at least two temporary pushing positions are determined as described above. Relationship, calculate the final squeeze-in position (bottom dead point) where the target bending angle can be obtained. Next, the control flow of the amount of squeezed in the mold in this embodiment will be described in order according to the flow chart shown in FIG. u 1: Read in the bending conditions (material, plate thickness, bending shape, mold shape, mechanical information, etc.) of the workpiece W, which was entered in advance and memorized in the memory means 12. • 17- (Please read the precautions on the back before filling this page) This paper size applies the Chinese National Standard (CNS) A4 size (210X297 mm) 514569 Λ7 B7 V. Description of the invention (15) u2: From the workpiece to the bending For the relationship between the die intrusion amount D at angle 0 (refer to Figure 6) and the springback angle of the workpiece W to the target bending angle, select the% relationship of defort (the initial 具有 of the NC device). Calculate the temporary squeeze position when the upper and lower molds are close to each other. In other words, calculate the angle detection position at η (η 2 2). It should be noted that these temporarily pushed-in positions are preferably in a range where the workpiece W is not excessively bent, and at least one position is preferably as close as possible to the target bending angle. u 3 to u 5: The operator sets the workpiece W and starts the bending process, so that the upper die 5 moves closer to the lower die 3 to the initial temporary squeeze position among the temporary squeeze positions at η. Then, when the temporary pushing position is reached, the bending angle of the work W is detected by the angle detecting unit 7. u6: When the number of angle detections N does not reach η (N < η), the upper die 5 is moved to the second temporary extrusion position again, and the bending angle of the workpiece W is detected again at the second temporary extrusion position. Furthermore, this process is repeated until it becomes N = η. Employees of the Central Bureau of Standards, Ministry of Economic Affairs, Cooperative Co-operative Printing u 7: Detect the result from the angle η above, and calculate the ratio of the change in the amount of squeeze in to the change in the actual bending angle. For example, when η. = 2, the ratio dD / d0 of the difference d D between the squeeze-in amount at the two-point angle detection position and the difference d0 between the detection angles is calculated. Then, using the relationship of the rebound angle 0 s of the comparative ratio dD / d 0 memorized in advance, in other words, using the dD / 〇10 ~ 08 curve (refer to Fig. 7), the ratio corresponding to the calculated ratio as described above is obtained. The rebound angle of dD / d 0 is 0 s. In this way, the springback angle at the target bending angle is estimated to be 0 s. Here, when calculating the aforementioned ratio dD / d 0, if the angle detection position (temporarily squeezed in position) is 2 -18- This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) 514569 B7 V. Invention When explaining (16) points (η = 2), it is possible to obtain a straight line passing through these two points on the graph showing the relationship between the amount of mold intrusion D with respect to the bending angle 0, based on the two detections, and It is better than dD / d Θ. In addition, when the angle detection position (temporary squeeze-in position) is 3 or more (3), the ratio d D / d 0 can be obtained from the three detection thresholds using a method such as the minimum automultiplication method. Furthermore, Fig. 7 will show the relationship between the rebound angle 0 s of dD / d 0 and the experimental data. Printed by the Consumer Cooperatives of the Central Bureau of Economic Affairs, Ministry of Economic Affairs, U 8: Using the change in the amount of dD (zdi-ds) and the change in the actual bending angle d0 (βχ- 02), and the springback angle 0 s to the target bending angle 0τ obtained as described above, to obtain a final squeeze-in position d τ that can obtain the target bending angle 0τ (see FIG. 9). Here, when the final squeeze-in position dT is calculated, if the angle detection position (temporary squeeze-in position) is two (η = 2), a graph showing the relationship between the die squeeze-in amount D for a bending angle of 0 can be displayed. (Refer to FIG. 9) On the basis of the two detection points, a straight line passing through these two points is obtained, and the final squeeze-in position dT is obtained. In addition, when the angle detection position (temporary squeeze-in position) is 3 or more (η ^ 3), three or more can be detected, and the final squeeze-in position d τ can be obtained by using methods such as the minimum self-multiplication method. u 9: Drive the upper mold 5 to its position again according to the estimated final squeeze-in position d T. u 1 〇: Finish the process and end the process. Although the process shown in this flow can be performed every time during the bending process, it can also be any process such as when the batch of materials is changed. -19- (Read the precautions before you read this and then fill out this page ) This paper size applies to China National Standard (CNS) A4 (210X297 mm) 514569
五、發明説明（17 ) 由操作員指示校正操作。 根據本實施例時，至少由在2處之角度檢出位置所檢 出的實際彎曲角度被指定工件之彈回角度及驅動模的最終 擠入位置，即使在材料之批間有材料特性値的參差時，也 能夠精確地推定彈回角度及最終擠入位置，而根據該最終 产 擠入位置被進行彎曲加工，故能夠實現極高精確度之彎曲 加工。 雖然在前述各實施例，係做爲檢出彎曲角度的角度檢 出手段，說明使用將縫隙光投光之光源，和把線狀投光像 攝影的C C D攝影機而成之角度檢出裝置者，但是，做爲 該角度檢出手段，此外，能夠採用靜電容量式者，光電式 者，接觸式者等各種型式者。 雖然在前述各實施例，係說明將下模做爲固定式者而 使上模驅動的適用在所謂上驅動型之壓軋機者，可是，本 發明，當然也能夠對把上模做爲固定式，而使下模驅動之 所謂下驅動型之壓軋機。 經濟部中央標準局員工消費合作社印裝 〔圖面之簡單說明〕 ’ 第1圖，係關於本發明的第1實施例之彎曲加工裝置 的系統構成圖。 第2圖，係顯示η値和彈回角度的相關之圖表。 第3圖，係顯示η値和材料的彎曲半徑之相關的圖表 〇 第4圖，係說明在同一下死點之彎曲半徑和彎曲角度 -20- (請先閱讀背而之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS ) A4«L格（210X297公釐） 514569 經濟部中央標隼局員工消費合作社印製 五、發明説明（18 ) 的關係之圖。 第5圖，係顯示在第1實施例的模具擠入量之控制流 程的流程圖。 第6圖，係顯示對彎曲角度的擠入量之關係的圖表。 第7圖，係顯示對dD/d 0的彈回角度之關係的圖 表。 第8圖，係顯示在第2實施例的模具擠入量之控制流 程的流程圖。 第9圖，係說明最終擠入位置dT的求法之圖表。 第1 0圖，係說明第2實施例的效果之圖。 第1 1圖，係顯示在第3實施例的模具擠入量之控制 流程的流程圖。 第1 2圖，係顯示工作角度和彈回角度的關係之圖表 〇 第1 3圖，係說明對彎曲角度的擠入量之關係依材料 而不同的圖表。 〔圖號說明〕 ‘ 1 固定台 2 模座 3 下模 4 撞鎚 5 上模 6 制止逆行裝置 本纸張尺度適用中國國家標準（CNS ) Α4ί見格（210X297公釐） -21 · (請先閱讀背面之注意事項再填寫本頁) 514569 A7 B7 五、發明説明（19 ) 7 角度檢出單元 8 光源 9 ! C C D攝影機 1 0 彎曲角度運算部 1 1 N C裝置 1 2 記憶手段 1 3 運算手段 W 工件 Θ 彎曲角度 d T 最終擠入位置 (誚先閲讀背而之注意事項再填寫本頁) •裝 本紙张尺度这用中SS家標潭（CNS ) Λ4規格（210X297公釐） -22-5. Description of the invention (17) Corrective operation is instructed by the operator. According to this embodiment, the actual bending angle detected from at least two angle detection positions is specified by the springback angle of the workpiece and the final squeeze-in position of the driving die, even if there are material characteristics between the batches of materials. In case of unevenness, it is also possible to accurately estimate the springback angle and the final extrusion position, and the bending process is performed according to the final production extrusion position, so that extremely accurate bending can be realized. Although in the foregoing embodiments, as the angle detection means for detecting the bending angle, an angle detection device using a light source that projects slit light and a CCD camera that shoots a linear projection image will be described. However, as the angle detection means, various types such as an electrostatic capacitance type, a photoelectric type, and a contact type can be used. Although in the foregoing embodiments, it is explained that the lower mold is fixed and the upper mold is driven by a so-called upper-drive type rolling mill, the present invention can of course also make the upper mold fixed. The so-called lower-driving type rolling mill driven by the lower die. Printed by the Employees' Cooperatives of the Central Standards Bureau of the Ministry of Economics [Simplified Description of Drawings] ′ FIG. 1 is a system configuration diagram of a bending processing device according to the first embodiment of the present invention. Fig. 2 is a graph showing the correlation between η 値 and the rebound angle. Figure 3 is a graph showing the relationship between η 値 and the bending radius of the material. Figure 4 is a graph showing the bending radius and bending angle at the same bottom dead point -20- (Please read the precautions before filling in this (Page) This paper size applies the Chinese National Standard (CNS) A4 «L (210X297 mm) 514569 Printed by the Consumer Cooperatives of the Central Bureau of Standards of the Ministry of Economic Affairs 5. The relationship between the invention description (18). Fig. 5 is a flowchart showing a control flow of the amount of squeezed in the die in the first embodiment. FIG. 6 is a graph showing the relationship between the amount of intrusion with respect to the bending angle. Fig. 7 is a graph showing the relationship between the springback angle to dD / d0. Fig. 8 is a flow chart showing a control flow of the amount of squeeze of the die in the second embodiment. FIG. 9 is a graph explaining how to find the final squeeze-in position dT. Fig. 10 is a diagram explaining the effect of the second embodiment. Fig. 11 is a flowchart showing a control flow of the amount of squeezed in the die in the third embodiment. Figure 12 is a graph showing the relationship between the working angle and the springback angle. Figure 13 is a graph showing the relationship between the amount of intrusion to the bending angle depending on the material. [Illustration of drawing number] '1 Fixing table 2 Mold base 3 Lower mold 4 Hammer 5 Upper mold 6 Stopping retrograde device This paper is applicable to Chinese National Standard (CNS) Α4ί See grid (210X297 mm) -21 · (please first Read the precautions on the back and fill in this page) 514569 A7 B7 V. Description of the invention (19) 7 Angle detection unit 8 Light source 9! CCD camera 1 0 Bending angle calculation unit 1 1 NC device 1 2 Memory means 1 3 Calculation means W Workpiece Θ Bend angle d T Final squeeze position (位置 Please read the back first and then fill out this page) • The size of the paper used is SS House Standard Pool (CNS) Λ4 Specification (210X297 mm) -22-